How to play
Pick a part from the top bar, then tap / click empty space to drop it.
Drag a part to move it. Tap a switch to flip it on/off.
Wire it up: drag from a port dot to another port — or tap one port, then tap the other.
Inputs are on the left, outputs on the right. Tap a wire to select, then hit 🗑.
Keyboard: Tab cycle parts · arrows move · Space flip switch ·
Del delete · 1…9 pick part · Esc hand tool.
Choose a goal from the dropdown: wire the two switches A,B to the OUT lamp so the
truth table matches, then press Test. Some goals only give you a limited toolbox!